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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/185473
Search for excited Bc + states
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: A search is performed in the invariant mass spectrum of the B+ c π +π − system for the excited B+ c states Bc(21S0) + and Bc(23S1) + using a data sample of pp collisions collected by the LHCb experiment at the centre-of-mass energy of √ s = 8 TeV, corresponding to an integrated luminosity of 2 fb−1 . No evidence is seen for either state. Upper limits on the ratios of the production cross-sections of the Bc(21S0) + and Bc(23S1) + states times the branching fractions of Bc(21S0) + → B+ c π +π − and Bc(23S1) + → B∗+ c π +π − over the production cross-section of the B+ c state are given as a function of their masses. They are found to be between 0.02 and 0.14 at 95% confidence level for Bc(21S0) + and Bc(23S1) + in the mass ranges [6830, 6890] MeV/c2 and [6795, 6890] MeV/c2 , respectively.
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LHCb Collaboration, et al. Search for excited Bc + states. Journal of High Energy Physics. 2018. Vol. 2018, num. 1, pags. 1-18. ISSN 1126-6708. [consulted: 16 of August of 2026]. Available at: https://hdl.handle.net/2445/185473